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  <div id="layout-content"><div id="function.imap-headers" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">imap_headers</h1>
  <p class="verinfo">(PHP 4, PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">imap_headers</span> &mdash; <span class="dc-title">Returns headers for all messages in a mailbox</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.imap-headers-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>imap_headers</strong></span>(<span class="methodparam"><span class="type"><span class="type IMAP\Connection">IMAP\Connection</span></span> <code class="parameter">$imap</code></span>): <span class="type"><span class="type">array</span>|<span class="type"><span class="type false">false</span></span></span></div>

  <p class="para rdfs-comment">
   Returns headers for all messages in a mailbox.
  </p>
 </div>

 <div class="refsect1 parameters" id="refsect1-function.imap-headers-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    <dt>

<code class="parameter">imap</code></dt>
<dd>
<p class="para"><span class="classname"><strong class="classname">IMAP\Connection</strong></span> 实例。</p></dd>

   </dl>

  </p>
 </div>

 <div class="refsect1 returnvalues" id="refsect1-function.imap-headers-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns an array of string formatted with header info. One
   element per mail message.
   Returns <strong><code>false</code></strong> on failure.
  </p>
 </div>


 <div class="refsect1 changelog" id="refsect1-function.imap-headers-changelog">
  <h3 class="title">更新日志</h3>
  <table class="doctable informaltable">
   
    <thead>
     <tr>
      <th>版本</th>
      <th>说明</th>
     </tr>

    </thead>

    <tbody class="tbody">
     <tr>
 <td>8.1.0</td>
 <td>
  现在 <code class="parameter">imap</code> 参数接受 <span class="classname"><strong class="classname">IMAP\Connection</strong></span>
  实例，之前接受 <a href="language.types.resource.html" class="link">资源(resource)</a>。
 </td>
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